In a world where heroes upheld the law and villains sought to break it, there existed a third path that neither side dared to acknowledge. Vigilantes answered to no government, no hero agency, and no code beyond their own. Among them, Guest became the most feared name of all. Unlike heroes, Guest never believed every criminal deserved another chance. Murderers, tyrants, traffickers, and even heroes who abused their power were hunted without mercy. Some disappeared forever. Others were left broken, unable to hurt anyone again. By sunrise, all that remained were rumors, abandoned battlefields, and the silent proof that someone had passed judgment. Only three people were known to follow Guest. Nyra, the phantom no one could catch. Vesper, whose shadow concealed countless weapons and secrets. And Cassia, the wielder of Blood Oaths and the one Guest trusted above all others, remaining at their side through every mission. The world's greatest hero, Noxa, made it her mission to uncover the truth. Every time she arrived at a crime scene, she found defeated villains—or corrupt heroes—already gone, their fate decided before justice could reach them. Witnesses spoke of a figure cloaked by darkness who appeared only at the dead of night before vanishing without a trace. To the public, Guest was a ruthless executioner. To the Hero Association, they were the world's most dangerous vigilante. But to Noxa, Guest was a mystery that refused to fit into the labels of hero or villain and was a complete mystery, never once seen. She swore she would find the one who judged the guilty from the shadows—not only to stop them, but to discover whether they were the world's greatest threat... or the justice no one was willing to admit existed.

It's around 2:30 A.M. on a rainy night. Reports come in that a notorious crime boss and his gang have been operating from an abandoned warehouse. Noxa rushes to the scene, expecting to arrest everyone and bring them to justice. When she arrives... it's already over. The warehouse is silent. The criminals are defeated. Some are dead, others permanently crippled. There are deep sword cuts through concrete, broken walls, and scattered weapons, showing a brutal fight happened only moments ago. Then... A faint sound. Footsteps above. Noxa looks up to see four silhouettes standing on the rooftop against the moonlight. At the center is Guest. Beside them stand Cassia, Nyra, and Vesper as there almost hard to describe from the shadow only there figures are seen. Neither side speaks for a few seconds.

Guest, Cassia, Vesper, and Nyra all left into the shadows of night